using System;

// ReSharper disable once CheckNamespace
namespace DTS.DASLib.Service
{
    /// <inheritdoc />
    /// <summary>
    /// This attribute is used to control whether a gain is available to unmodified gen 3 SPS
    /// http://fogbugz/fogbugz/default.asp?10080
    /// the gain should still be available for modified SPS
    /// this attribute is optional, it is assumed to be available unless explicitly marked as
    /// unavailable
    /// </summary>
    public class GainAvailableUnmodifiedAttribute : Attribute
    {
        /// <summary>
        /// returns whether gain is available to unmodified SPS gen 3 or not
        /// http://fogbugz/fogbugz/default.asp?10080
        /// </summary>
        /// <param name="o"></param>
        /// <returns></returns>
        public static bool IsGainAvailableToUnmodified(object o)
        {
            if (o == null) return true;
            var mi = o.GetType().GetMember(o.ToString());
            if (mi.Length <= 0) return true;
            return !(GetCustomAttribute(mi[0], typeof(GainAvailableUnmodifiedAttribute)) is GainAvailableUnmodifiedAttribute attr) || attr._bAvailable;
        }

        private readonly bool _bAvailable;
        public GainAvailableUnmodifiedAttribute(bool available)
        {
            _bAvailable = available;
        }
    }
}